Can you pass this Science quiz?
Erin reads an average of 20 books per year. She read 23, 17, 20, and 19 books in four different years. How many books did Erin read in the 5th year to make it an average of exactly 20.0 per year?
17
20
21
19
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Paul took a science test in school. If he got 23 out of 27 questions right what percentage did he score?